Yr2 Regular Expressions

Question 1

What does is the function of +

Answer 1

One or more repetitions required

Question 2

What is the function of ?

Answer 2

0 or one repetitions required

Question 3

What is the function of |

Answer 3

Means or

Question 4

What does [abc] mean?

Answer 4

a or b or c

Question 5

What is the function of *

Answer 5

Means 0 or more repetitions required

Question 6

What does [^abc] mean?

Answer 6

Any characters except a or b or c

Question 7

What does [a-z] mean?

Answer 7

Any lowercase character in range a-z

Question 8

Write a regular expression that matches:
The letter b, followed by zero or more occurrences of “cd”, followed by a single e or “fg”

Answer 8

b(cd)*(e|fg)